如何从Ruby 2.0中的字符串数组中获取值

我有这个字符串数组：

array = [ "nike air", "nike steam","nike softy" ,"nike strength", "smooth sleeper","adidas air","addidas jogar","adidas softy","adidas heels"] 

我想从中提取字符串作为SQL查询。

例如，如果用户输入单词“nike”。 然后应返回4个字符串作为结果

  "nike air", "nike steam","nike softy" ,"nike strength" 

例如，如果用户输入单词“adidas”。 然后应返回4个字符串作为结果

  "adidas air","addidas jogar","adidas softy","adidas heels" 

可能吗？

Answer 1

 array.grep(query) 

返回与查询匹配的数组子集。

Answer 2

使用Enumerable#grep ：

 matches = array.grep /nike/ 

添加/i不区分大小写。 要从字符串构造正则表达式：

 re = Regexp.new( Regexp.escape(my_str), "i" ) 

或者，如果您希望用户能够使用特殊的Regexp查询，只需：

 matches = array.grep /#{my_str}/ 

Answer 3

或者您可以自己构建查询方法：

 def func( array ) array.each_with_object [] do |string, return_array| return_array << string if string =~ /nike/ end end 

Answer 4

 array = [ "nike air", "nike steam","nike softy" ,"nike strength", "smooth sleeper","adidas air","addidas jogar","adidas softy","adidas heels"] array.select{|i| i.include? "nike"} # >> ["nike air", "nike steam", "nike softy", "nike strength"]